feat: beaching of particles

particle-track-and-trace/src/commands/SpawnPointCallback.h

@@ -23,12 +23,15 @@ public:
 
   void setRen(const vtkSmartPointer<vtkRenderer> &ren);
 
+  void setBeached(const vtkSmartPointer<vtkIntArray> &parts);
+
   void setUVGrid(const std::shared_ptr<UVGrid> &uvGrid);
 
 private:
   vtkSmartPointer<vtkPolyData> data;
   vtkSmartPointer<vtkPoints> points;
   vtkSmartPointer<vtkRenderer> ren;
+  vtkSmartPointer<vtkIntArray> particlesBeached;
   std::shared_ptr<UVGrid> uvGrid;
   vtkSmartPointer<vtkMatrix4x4> inverseCartographicProjection;